here. up to 20,000 of the country's angriest men. some of the men that worked at camp bucca called it simply camp hell. it wasn't just crowded, it was violent. in 2005 riots broke out. detainees wint on a rampage, take -- went on a rampage, taking over whole sections of the camp. they massed outside the fences firing into the crowd. at least four prisoners were killed. >> now, this is camp bucca. >> major general doug stone was brought in to fix camp bucca. even he was wary of the inmates. here he is giving cnn's nick robertson a tour in 2008. >> we got about 2,000 identified al qaeda here in the theater